Finding the Fourth Proportional to 14,648.72, 21,972.87 and 3,555.50

Step by Step Solution

1. Step 1: Write the proportion equation
   14,648.72 : 21,972.87 = 3,555.50 : x
2. Step 2: Convert to fraction form
   14,648.72/21,972.87 = 3,555.50/x
3. Step 3: Cross multiply
   14,648.72x = 21,972.87 × 3,555.50
4. Step 4: Simplify right side
   14,648.72x = 78,124,539.29
5. Step 5: Solve for x
   x = 78,124,539.29/14,648.72
6. Step 6: Final answer
   x = 5,333.20